JPS5497686A - Porous multi-ply calcined material of polytetrafluoroethylene and its production - Google Patents

Porous multi-ply calcined material of polytetrafluoroethylene and its production

Info

Publication number
JPS5497686A
JPS5497686A JP506978A JP506978A JPS5497686A JP S5497686 A JPS5497686 A JP S5497686A JP 506978 A JP506978 A JP 506978A JP 506978 A JP506978 A JP 506978A JP S5497686 A JPS5497686 A JP S5497686A
Authority
JP
Japan
Prior art keywords
sheets
ply
polytetrafluoroethylene
calcined material
calcined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP506978A
Other languages
Japanese (ja)
Inventor
Shigeru Asako
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP506978A priority Critical patent/JPS5497686A/en
Publication of JPS5497686A publication Critical patent/JPS5497686A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the title calcined material suitable for filters, electrolysis diaphragms, electric wire coating compounds, etc., having a uniform pore size distribution and improved strength, permeability, and flexbility, by calcining polytetrafluoroethylene multi-ply sheets previously orientated.
CONSTITUTION: 100 parts by volume of polytetrafluoroethylene (PTFE) powder is blended with 15W30 parts by volume of a liquid lubicant, e.g., to toluene, and then extruded or calendered to form sheets. After the lubricant is removed from the sheets by extraction, etc., the sheets are stretched by rolls or a tenter. The stretched PTFE porous sheets are piled to prepare multi-ply sheets, which are uniformly brought into contact with adjoining sheets and calcined at not lower than 327°C to give the desired porous multi-ply calcined material.
COPYRIGHT: (C)1979,JPO&Japio
JP506978A 1978-01-19 1978-01-19 Porous multi-ply calcined material of polytetrafluoroethylene and its production Pending JPS5497686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP506978A JPS5497686A (en) 1978-01-19 1978-01-19 Porous multi-ply calcined material of polytetrafluoroethylene and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP506978A JPS5497686A (en) 1978-01-19 1978-01-19 Porous multi-ply calcined material of polytetrafluoroethylene and its production

Publications (1)

Publication Number Publication Date
JPS5497686A true JPS5497686A (en) 1979-08-01

Family

ID=11601088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP506978A Pending JPS5497686A (en) 1978-01-19 1978-01-19 Porous multi-ply calcined material of polytetrafluoroethylene and its production

Country Status (1)

Country Link
JP (1) JPS5497686A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131236A (en) * 1980-11-06 1982-08-14 Gore & Ass Multi-component porous high strength ptfe products and manufacture
US4478665A (en) * 1980-11-06 1984-10-23 W. L. Gore & Associates, Inc. Method for manufacturing highly porous, high strength PTFE articles
US5217666A (en) * 1991-05-29 1993-06-08 Daikin Industries Ltd. Process for producing porous polytetrafluoroethylene film
WO1996004133A1 (en) * 1994-08-03 1996-02-15 Textiles Coated Incorporated Polytetrafluoroethylene laminate and method of producing same
JP2009044731A (en) * 2007-07-18 2009-02-26 Nitto Denko Corp Water-proof sound-transmitting membrane, method for production of water-proof sound-transmitting membrane, and electrical appliance using the membrane
JP2010241047A (en) * 2009-04-08 2010-10-28 Nitto Denko Corp Waterproof sound-transmitting film, and waterproof sound-transmitting member and electric appliance using the same
JP2011003358A (en) * 2009-06-17 2011-01-06 Toyota Motor Corp Method of manufacturing porous membrane for fuel-cell electrolyte membrane
JP2011212604A (en) * 2010-03-31 2011-10-27 Fujifilm Corp Crystalline polymer microporous membrane, method for producing the same, and filtration filter using the same
US8272517B2 (en) 2009-01-21 2012-09-25 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for producing the water-proof sound-transmitting membrane, and electrical appliance including the water-proof sound-transmitting membrane
CN105983352A (en) * 2015-02-16 2016-10-05 上海灵氟隆新材料科技有限公司 High-flux thick polytetrafluoroethylene film and preparation method thereof

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131236A (en) * 1980-11-06 1982-08-14 Gore & Ass Multi-component porous high strength ptfe products and manufacture
US4478665A (en) * 1980-11-06 1984-10-23 W. L. Gore & Associates, Inc. Method for manufacturing highly porous, high strength PTFE articles
JPH0258291B2 (en) * 1980-11-06 1990-12-07 Daburyu Eru Goa Ando Asosheetsu Inc
JPH06298978A (en) * 1980-11-06 1994-10-25 W L Gore & Assoc Inc Porous highly strong ptfe multilayer article
US5217666A (en) * 1991-05-29 1993-06-08 Daikin Industries Ltd. Process for producing porous polytetrafluoroethylene film
WO1996004133A1 (en) * 1994-08-03 1996-02-15 Textiles Coated Incorporated Polytetrafluoroethylene laminate and method of producing same
EP2174778A4 (en) * 2007-07-18 2012-11-21 Nitto Denko Corp Water-proof sound-transmitting membrane, method for production of water-proof sound-transmitting membrane, and electrical appliance using the membrane
EP2174778A1 (en) * 2007-07-18 2010-04-14 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for production of water-proof sound-transmitting membrane, and electrical appliance using the membrane
JP2009044731A (en) * 2007-07-18 2009-02-26 Nitto Denko Corp Water-proof sound-transmitting membrane, method for production of water-proof sound-transmitting membrane, and electrical appliance using the membrane
US20130099411A1 (en) * 2007-07-18 2013-04-25 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for producing water-proof sound-transmitting membrane, and electrical appliance using the membrane
US8663530B2 (en) 2007-07-18 2014-03-04 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for producing water-proof sound-transmitting membrane, and electrical appliance using the membrane
US8695812B2 (en) 2007-07-18 2014-04-15 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for producing water-proof sound-transmitting membrane, and electrical appliance using the membrane
US8272517B2 (en) 2009-01-21 2012-09-25 Nitto Denko Corporation Water-proof sound-transmitting membrane, method for producing the water-proof sound-transmitting membrane, and electrical appliance including the water-proof sound-transmitting membrane
JP2010241047A (en) * 2009-04-08 2010-10-28 Nitto Denko Corp Waterproof sound-transmitting film, and waterproof sound-transmitting member and electric appliance using the same
JP2011003358A (en) * 2009-06-17 2011-01-06 Toyota Motor Corp Method of manufacturing porous membrane for fuel-cell electrolyte membrane
JP2011212604A (en) * 2010-03-31 2011-10-27 Fujifilm Corp Crystalline polymer microporous membrane, method for producing the same, and filtration filter using the same
CN105983352A (en) * 2015-02-16 2016-10-05 上海灵氟隆新材料科技有限公司 High-flux thick polytetrafluoroethylene film and preparation method thereof

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